Stockholders' Equity Stockholder's Equity (Reclassification out of Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Reclassification out of Accumulated Other Comprehensive Income
Selling, general and administrative expense	$ (174.0)		$ (182.8)
Income before income taxes	185.0		203.5
Income tax (expense) benefit	(36.9)		(67.0)
Net income	148.1		136.5
Reclassification out of Accumulated Other Comprehensive Income | Hedging | Foreign Exchange Contract
Reclassification out of Accumulated Other Comprehensive Income
Revenue	(26.4)		(10.5)
Cost of sales	11.5		11.3
Selling, general and administrative expense	(0.5)		(0.1)
Income before income taxes	(15.4)		0.7
Income tax (expense) benefit	2.4		1.7
Net income	(13.0)		2.4
Reclassification out of Accumulated Other Comprehensive Income | Defined Pension and Other Post-retirement Benefits
Reclassification out of Accumulated Other Comprehensive Income
Amortization of actuarial gain (loss)	(7.8)	[1]	(4.7)	[1]
Amortization of prior service credit (cost)			0.1	[1]
Income before income taxes	(7.8)		(4.6)
Income tax (expense) benefit	2.5		1.9
Net income	$ (5.3)		$ (2.7)

[1] (a) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 8 for additional details).